Good morning and welcome to a special edition of "this week." We have picked ourselves up. We have fought our way back. Tears in triumph. I'm really proud of all of you. Grace in defeat. I pray that the president will be successful in guiding our nation. And a shocking resignation. This news is truly stunning. Did david petraeus' extramarital affair compromise intelligence? With washington still divided after tuesday's election, can the president and congress find common ground on the fiscal cliff, immigration and other big issues? We'll ask our headliners, the vice chair of the senate intelligence committee, republican saxby chambliss and the senator responsible to adding to the democrat majority, senator patty murray. And our powerhouse round table, with representatives donna edwards and aaron schock, paul gigot, katrina vanden heuvel and greta van susteren. Hello, again. What a week in politics. With his victory in florida yesterday, president obama now has a sweep of the battlegrounds. 332 electoral votes. Losing only indiana and north carolina from his 2008 total. The popular votes are still coming in. The president will come up about 8 million short of his 2008 tally. But, he's holding about 3 million advantage over mitt romney. We'll discuss how obama did and what's next for the gop and the governing challenges ahead? But first, that friday afternoon bombshell. David petraeus resigns at the cia after the fbi uncovers his extramarital affair. Pierre thomas is here with the latest. First came upon this several months ago. Yes, it came to light after a woman in tampa tied to military got a peculiar, harassing e-mail. The woman was so concerned, she contacted the fbi, who, then, according to our sources, traced it back to paula broadwell, who wrote a book about petraeus. As the fbi continued to investigate, they discovered e-mails pointing to a romantic, sexual relationship between the two. Early concerns about the e-mails being hacked. But the investigation never turned up evidence of national security being compromised. But what did find was lots of human drama. What more do they have to investigate now and why wasn't the white house told until this week? The fbi investigation is largely done and the early evidence is that there will not be criminal charges. Again, sources say that this deinvolved into a personal matter. Petraeus had been confronted in the last couple of weeks, as for the timing of the disclosure, one official said that's just how it played out. George? All right, pierre. Let's turn to saxby

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